Earthquake with magnitude of Md 3.1 on date 30-03-1985 and time 08:45:54 (UTC) in region 3 km SE Terni (TR)

A magnitude Md 3.1 earthquake occured in region: 3 km SE Terni (TR), on

  • 30-03-1985 08:45:54 (UTC)
  • 30-03-1985 09:45:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.54, 12.68 at 7 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Terni TR 3 111501 111501
Stroncone TR 5 4917 116418
Arrone TR 9 2763 119181
Colli sul Velino RI 10 533 119714
Montefranco TR 10 1276 120990
Labro RI 10 374 121364
Greccio RI 12 1558 122922
Morro Reatino RI 13 373 123295
Ferentillo TR 13 1913 125208
Configni RI 13 633 125841
Narni TR 13 19785 145626
San Gemini TR 13 5018 150644
Polino TR 15 233 150877
Cottanello RI 15 563 151440
Rivodutri RI 15 1253 152693
Contigliano RI 16 3783 156476
Montasola RI 17 395 156871
Vacone RI 17 256 157127
Poggio Bustone RI 18 2055 159182
Calvi dell'Umbria TR 18 1856 161038
Montecastrilli TR 20 5022 166060
Acquasparta TR 20 4778 170838

Municipalities with at least 50000 inhabitants

An earthquake occurred to
3 Km SE of Terni (111501 inhabitants)
46 Km S of Foligno (57155 inhabitants)
49 Km E of Viterbo (67173 inhabitants)
60 Km N of Guidonia Montecelio (88673 inhabitants)
63 Km W of L'Aquila (69753 inhabitants)
65 Km N of Tivoli (56533 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
74 Km N of Roma (2864731 inhabitants)
85 Km W of Teramo (54892 inhabitants)
88 Km NE of Civitavecchia (52991 inhabitants)
93 Km NE of Fiumicino (78395 inhabitants)
95 Km N of Velletri (53303 inhabitants)
98 Km N of Pomezia (62966 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 1000 Md 3.1 1985-03-30
08:45:54
42.54 12.68 7 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 3789
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-03-30 08:45:54 ± 0.222
Latitude 42.54 ± 0.01
Longitude 12.68 ± 0.02
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 3789

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 1835.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 155
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00138
Epicentral distance of station farthest from the epicenter (degree) 0.01085
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 3789
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:08:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SD1.Z. 1985-03-30T08:46:34.00 10.0 undecidable manual SN 134 0.0106 0.42 0.4
--.CH1.Z. 1985-03-30T08:46:33.50 10.0 undecidable manual SN 334 0.0108 -0.77 0.2
--.AR1.Z. 1985-03-30T08:46:27.50 10.0 undecidable manual SG 11 0.0087 -0.54 0.4
--.RDP.Z. 1985-03-30T08:46:21.50 10.0 undecidable manual SG 177 0.007 -0.25 0.7
--.CH1.Z. 1985-03-30T08:46:19.00 10.0 undecidable manual PN 334 0.0108 1.7 0
--.SD1.Z. 1985-03-30T08:46:17.70 10.0 undecidable manual PN 134 0.0106 0.79 0.4
--.AQU.Z. 1985-03-30T08:46:15.00 10.0 undecidable manual SG 108 0.005 0.16 0.5
--.AR1.Z. 1985-03-30T08:46:13.20 10.0 undecidable manual PG 11 0.0087 -0.51 1.4
--.AS1.Z. 1985-03-30T08:46:13.70 10.0 undecidable manual SG 358 0.0047 0.26 0.7
--.RDP.Z. 1985-03-30T08:46:09.70 10.0 undecidable manual PG 177 0.007 -0.38 2
--.AS1.Z. 1985-03-30T08:46:05.20 10.0 positive manual PG 358 0.0047 -0.08 2.5
--.AQU.Z. 1985-03-30T08:46:05.50 10.0 undecidable manual PG 108 0.005 -0.59 0.8
--.PO9.Z. 1985-03-30T08:46:02.00 10.0 undecidable manual SG 79 0.0018 -0.12 0.8
--.MNS.Z. 1985-03-30T08:46:00.00 10.0 undecidable manual SG 178 0.0014 -0.53 0.5
--.PO9.Z. 1985-03-30T08:45:59.00 10.0 undecidable manual PG 79 0.0018 0.26 2.3
--.MNS.Z. 1985-03-30T08:45:58.00 10.0 undecidable manual PG 178 0.0014 0.18 2.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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